Debt Obligations - Schedule of Senior Notes and Loans (Parenthetical) (Detail) - Jun. 30, 2021 € in Millions, SFr in Millions, $ in Millions	EUR (€)	USD ($)	CHF (SFr)
Senior notes EUR 1,500 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount | €	€ 1,500
Senior notes EUR 1,300 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount | €	1,300
Senior notes EUR 900 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount | €	900
Senior notes EUR 750 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount | €	750
Senior notes EUR 700 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount | €	700
Senior notes EUR 700 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount | €	700
Senior notes EUR 1,000 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount | €	€ 1,000
Senior notes USD 1,000 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount		$ 1,000
Senior notes USD 3,500 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount		3,500
Senior notes USD 1,475 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount		1,475
Senior notes USD 3,000 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount		3,000
Senior notes USD 2,000 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount		2,000
Senior notes USD 1,250 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount		1,250
Senior notes USD 1,250 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount		1,250
Senior notes USD 844 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount		844
Senior notes USD 789 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount		789
Senior notes USD 613 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount		613
Senior notes USD 588 million [Member]
Debt Instrument [Line Items]
Debt instrument face amount		$ 588
Senior notes CHF 350 Million [Member]
Debt Instrument [Line Items]
Debt instrument face amount | SFr			SFr 350
Senior notes CHF 350 Million [Member]
Debt Instrument [Line Items]
Debt instrument face amount | SFr			SFr 350