Shareholders' Equity - Stock Repurchase Activity (Details) - USD ($)	3 Months Ended	9 Months Ended
Mar. 31, 2026	Sep. 30, 2026	Jun. 30, 2026
Stock Repurchase Activity [Roll Forward]
Balance, beginning of the period	$ 0	$ 0
Authorization of share repurchases in the first quarter of 2026	$ 2,000,000,000		$ 5,000,000,000
Authorization of additional share repurchases in the second quarter of 2026			$ 3,000,000,000
Repurchase of shares of Class A subordinate voting shares		(2,476,000,000)
Balance, end of the period		$ 2,524,000,000
Shares repurchased (in shares)		21,145,824
Average Price per Share (in dollars per share)		$ 117.09
Value of Shares Repurchased		$ 2,476,000,000

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.

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+ Details