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Derivative Financial Instruments - Narrative (Details) R in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2022 AUD ($)	Mar. 31, 2022 ZAR (R)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 AUD ($)	Dec. 31, 2021 ZAR (R)	Jun. 30, 2019 USD ($)
Derivative Financial Instruments [Abstract]
Unrealized net income (loss)	$ (637,000,000)				$ (738,000,000)
Interest expense	32,000,000	$ 50,000,000
Cash flow hedge to be reclassified to earnings within twelve months	25,000,000
Cash flow hedge to be reclassified to earnings remainder of the year	23,000,000
Accumulated other comprehensive loss
Derivative Financial Instruments [Abstract]
Unrealized net income (loss)	27,000,000				15,000,000
Interest rate swaps
Derivative Financial Instruments [Abstract]
Notional amount								$ 750,000,000
Interest expense	4,000,000	$ 4,000,000
Interest rate swaps | Accumulated other comprehensive loss
Derivative Financial Instruments [Abstract]
Unrealized net income (loss)	3,000,000				(25,000,000)
Australian Dollar Exchange Contract
Derivative Financial Instruments [Abstract]
Notional amount	254,000,000		$ 338
South African Rand Exchange Contract
Derivative Financial Instruments [Abstract]
Notional amount	222,000,000			R 3,200
Foreign Exchange Contract, South African Rand | Not Designated as Hedging Instrument
Derivative Financial Instruments [Abstract]
Notional amount	44,000,000			R 638	35,000,000		R 510
Foreign Exchange Contract, Australian Dollars | Not Designated as Hedging Instrument
Derivative Financial Instruments [Abstract]
Notional amount	$ 125,000,000		$ 167		$ 129,000,000	$ 172

X

- Definition

Cash Flow Hedge Gain (Loss) To Be Reclassified Remainder Of The Year

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

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The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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- Definition

Nominal or face amount used to calculate payment on derivative.

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Amount of the cost of borrowed funds accounted for as interest expense.

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