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Common Stock Repurchase Program - Repurchases (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended
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Apr. 30, 2024 | Feb. 29, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Sep. 30, 2024 | Sep. 30, 2023
Capital Stock, Dividends and Common Stock Repurchase Program |  |  |  |  |  |
Cash paid for repurchase of common stock |  |  |  |  | $ 262 | $ 990
Authorized share repurchases |  |  | $ 1,238 |  | $ 1,238 |
Accelerated Share Repurchase Agreement (ASR) [Member] |  |  |  |  |  |
Capital Stock, Dividends and Common Stock Repurchase Program |  |  |  |  |  |
Shares repurchased (in shares) | 0.2 | 1.0 |  |  |  |
Weighted average price per share (in dollars per share) |  | $ 199.16 |  |  |  |
Cash paid for repurchase of common stock |  | $ 250 |  |  |  |
Weighted average final purchase price (in dollars per share) | $ 206.23 |  |  |  |  |
10b5-1 Plan [Member] |  |  |  |  |  |
Capital Stock, Dividends and Common Stock Repurchase Program |  |  |  |  |  |
Shares repurchased (in shares) |  |  | 0.0 | 0.1 |  |
Cash paid for repurchase of common stock |  |  |  | $ 12 |  |
Weighted average final purchase price (in dollars per share) |  |  |  | $ 209.20 |  |
October 2023 Accelerated Share Repurchase Agreement [Member] |  |  |  |  |  |
Capital Stock, Dividends and Common Stock Repurchase Program |  |  |  |  |  |
Shares repurchased (in shares) |  | 0.2 |  |  |  |
Weighted average final purchase price (in dollars per share) |  | $ 175.29 |  |  |  |

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- Definition Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 + Details
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- Definition Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 30 -Name Accounting Standards Codification -Section 25 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481138/505-30-25-5 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 15 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-15 + Details
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