Supplemental Cash Flow Information - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Supplemental Cash Flow Information [Abstract]
Transfer from investments	$ 21	$ 14
Non-cash financing activities related to the issuance of shares for vested restricted stock units	60	50
Operating lease, payments	43	46
ROU asset obtained in exchange for operating lease liability	$ 8	$ 103

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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Value of stock issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

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Value of investments transferred from the entity's investments in noncash transactions.

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