Capital Stock - Additional Information (Detail) - Share Repurchase Program [Member] - USD ($) shares in Millions, $ in Millions	1 Months Ended	3 Months Ended
	Jan. 31, 2026	Mar. 31, 2026
Schedule of Capitalization, Equity [Line Items]
Shares authorized to be repurchased		8.8
Common Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Increased amount of shares to be purchased	9.2
Subco Units [Member]
Schedule of Capitalization, Equity [Line Items]
Common shares repurchased		0.4
Common shares repurchased, value		$ 450

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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