Derivative Instruments - Additional Information (Details) € in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2022 CAD ($)	Mar. 31, 2022 EUR (€)	Dec. 31, 2021 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net unrealized loss recognized in AOCI	$ (161,000,000)	$ (95,000,000)
Interest Rate Swaps - Period One
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	3,500,000,000
Interest Rate Swaps - Period Two
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	500,000,000
Interest Rate Swap One
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	3,500,000,000
Interest Rate Swap One | Interest expense, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net unrealized loss recognized in AOCI	143,000,000
Loss reclassified from OACI to Income	28,000,000
Interest Rate Swap Two
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	3,500,000,000
Interest Rate Swap Two | Interest expense, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net unrealized loss recognized in AOCI	213,000,000
Loss reclassified from OACI to Income	50,000,000
Cross Currency Interest Rate Contract | Fixed Income Interest Rate
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	5,000,000,000		$ 6,754
Cross Currency Interest Rate Contract | Fixed Income Interest Rate | Derivatives designated as net investment hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount					$ 150,000,000	$ 500,000,000	$ 400,000,000
Cross Currency Interest Rate Contract | Fixed Income Interest Rate | Hedge Funds
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	1,200,000,000			€ 1,108
Foreign Exchange Contract
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 203,000,000