Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Deficit - Summary of Changes in Shareholders' Deficit (Parenthetical) (Detail)

v3.20.2
Shareholders' Deficit - Summary of Changes in Shareholders' Deficit (Parenthetical) (Detail) - USD ($)
shares in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Equity [Abstract]        
Issuance of common shares 0.8 0.1 1.5 0.6
Repurchases of common shares 16.8 0.1 17.4 0.2
Forward Counterparties' delivery of common shares to the Company   4.0   6.0
Foreign currency translation adjustment, tax $ 700,000 $ (100,000) $ (4,100,000) $ (1,100,000)
Unrealized loss on derivatives, tax $ (100,000) $ 0 $ (400,000) $ 0