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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Subsequent Events (Details) - USD ($) $ in Millions			6 Months Ended
Subsequent Events (Details) - USD ($) $ in Millions	Jul. 29, 2021	Jul. 15, 2021	Jun. 30, 2021	Jun. 30, 2020	Jul. 19, 2021	Mar. 31, 2021
Subsequent Event [Line Items]
Proceeds from Divestiture of Businesses and Interests in Affiliates			$ 58	$ 44
Equity Method Investment, Ownership Percentage			10.00%
Guacolda [Member]
Subsequent Event [Line Items]
Equity Method Investment, Ownership Percentage						50.00%
Subsequent Event [Member] \| 1.375% Senior Notes due 2026 [Domain] \| Senior Notes [Member] \| Corporate and Other [Member] \| Secured Debt [Member]
Subsequent Event [Line Items]
Issued senior notes					$ 800
Debt Instrument, Interest Rate, Effective Percentage					1.375%
Subsequent Event [Member] \| 1.375% Senior Notes due 2026 [Domain] \| Senior Notes [Member] \| Corporate and Other [Member] \| Unsecured Debt [Member]
Subsequent Event [Line Items]
Issued senior notes					$ 800
Debt Instrument, Interest Rate, Effective Percentage					1.375%
Subsequent Event [Member] \| 2.45% Senior Notes due 2031 [Domain] \| Senior Notes [Member] \| Corporate and Other [Member] \| Secured Debt [Member]
Subsequent Event [Line Items]
Issued senior notes					$ 1,000
Debt Instrument, Interest Rate, Effective Percentage					2.45%
Subsequent Event [Member] \| 2.45% Senior Notes due 2031 [Domain] \| Senior Notes [Member] \| Corporate and Other [Member] \| Unsecured Debt [Member]
Subsequent Event [Line Items]
Issued senior notes					$ 1,000
Debt Instrument, Interest Rate, Effective Percentage					2.45%
Subsequent Event [Member] \| Global Infrastructure Partners
Subsequent Event [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		49.00%
Subsequent Event [Member] \| Chile Renovables SpA
Subsequent Event [Line Items]
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions		51.00%
Subsequent Event [Member] \| Chile Renovables SpA \| Global Infrastructure Partners
Subsequent Event [Line Items]
Unbilled Contracts Receivable		$ 441
Subsequent Event [Member] \| Chile Renovables SpA \| Global Infrastructure Partners \| Los Cururos [Member]
Subsequent Event [Line Items]
Proceeds from Sale of Interest in Partnership Unit	$ 53