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Condensed Consolidated Statement of Equity Statement - USD ($) shares in Millions, $ in Millions | Total | Preferred stock | Common stock | Additional paid-in capital | Accumulated Other Comprehensive Income | Retained earnings | Treasury stock | Parent | Noncontrolling interest | 2018 Share Repurchase Program | 2018 Share Repurchase Program Common stock | 2018 Share Repurchase Program Additional paid-in capital | 2018 Share Repurchase Program Retained earnings | 2018 Share Repurchase Program Treasury stock | 2018 Share Repurchase Program Parent | 2020 Share Repurchase Program | 2020 Share Repurchase Program Common stock | 2020 Share Repurchase Program Additional paid-in capital | 2020 Share Repurchase Program Retained earnings | 2020 Share Repurchase Program Treasury stock | 2020 Share Repurchase Program Parent | December 2019 Share Repurchase Program | December 2019 Share Repurchase Program Common stock | December 2019 Share Repurchase Program Additional paid-in capital | December 2019 Share Repurchase Program Retained earnings | December 2019 Share Repurchase Program Treasury stock | December 2019 Share Repurchase Program Parent
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Beginning balance, shares at Dec. 31, 2019 |  | 0.0 | 198.0 |  |  |  | 23.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance at Dec. 31, 2019 | $ 13,339.1 | $ 0.0 | $ 0.1 | $ 0.0 | $ (135.2) | $ 16,455.4 | $ (2,977.1) | $ 13,343.2 | $ (4.1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 3,702.9 |  |  |  |  | 3,642.7 |  | 3,642.7 | 60.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), net of tax | (89.4) |  |  |  | (90.3) |  |  | (90.3) | 0.9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital contribution by noncontrolling interest | 4.0 |  |  |  |  |  |  |  | 4.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution to noncontrolling interest | (75.0) |  |  |  |  |  |  |  | (75.0) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock, at cost, shares |  |  |  |  |  |  |  |  |  |  |  |  |  | (16.7) |  | (4.1) |  |  |  | (4.1) |  | (16.7) |  |  |  |  |
Repurchase of common stock, at cost |  |  |  |  |  |  |  |  |  | $ (5,000.0) |  |  |  | $ (5,000.0) | $ (5,000.0) | $ (1,279.1) |  |  |  | $ (1,279.1) | $ (1,279.1) |  |  |  |  |  |
Retirement of common stock pursuant to Share Repurchase Programs, at cost, shares |  |  |  |  |  |  |  |  |  |  | (16.7) |  |  | (16.7) |  |  | (4.1) |  |  | (4.1) |  |  |  |  |  |  |
Retirement of common stock pursuant to Share Repurchase Progams, at cost |  |  |  |  |  |  |  |  |  | 0.0 |  | $ (121.3) | $ (4,878.7) | $ 5,000.0 |  |  |  | $ (71.0) | $ (1,208.1) | $ 1,279.1 |  |  |  |  |  |  |
Issuance of common stock under stock option and stock purchase plans, shares |  |  | 0.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock under stock option and stock purchase plans | 38.8 |  |  | 38.8 |  |  |  | 38.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock under award plan, shares |  |  | 0.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock under stock award plan | (50.3) |  |  | 0.0 |  | (50.3) |  | (50.3) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation related to share-based payments | 154.2 |  |  | 154.2 |  |  |  | 154.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Other | (0.7) |  |  | (0.7) |  |  |  | (0.7) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance at Sep. 30, 2020 | 10,744.5 | $ 0.0 | $ 0.1 | 0.0 | (225.5) | 13,961.0 | $ (2,977.1) | 10,758.5 | (14.0) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance, shares at Sep. 30, 2020 |  | 0.0 | 177.7 |  |  |  | 23.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance, shares at Jun. 30, 2020 |  | 0.0 | 182.1 |  |  |  | 23.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance at Jun. 30, 2020 | 11,289.2 | $ 0.0 | $ 0.1 | 0.0 | (181.0) | 14,466.7 | $ (2,977.1) | 11,308.7 | (19.5) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 703.9 |  |  |  |  | 701.5 |  | 701.5 | 2.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), net of tax | (45.4) |  |  |  | (44.5) |  |  | (44.5) | (0.9) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital contribution by noncontrolling interest | 4.0 |  |  |  |  |  |  |  | 4.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution to noncontrolling interest | 0.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock, at cost, shares |  |  |  |  |  |  |  |  |  |  |  |  |  | (4.5) |  |  |  |  |  |  |  | (4.5) |  |  |  |  |
Repurchase of common stock, at cost |  |  |  |  |  |  |  |  |  | (1,250.0) |  |  |  | $ (1,250.0) | $ (1,250.0) |  |  |  |  |  |  |  |  |  |  |  |
Retirement of common stock pursuant to Share Repurchase Programs, at cost, shares |  |  |  |  |  |  |  |  |  |  | (4.5) |  |  | (4.5) |  |  |  |  |  |  |  |  |  |  |  |  |
Retirement of common stock pursuant to Share Repurchase Progams, at cost |  |  |  |  |  |  |  |  |  | $ 0.0 |  | $ (45.1) | $ (1,204.9) | $ 1,250.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock under stock option and stock purchase plans, shares |  |  | 0.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock under stock option and stock purchase plans | 9.7 |  |  | 9.7 |  |  |  | 9.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock under stock award plan | (2.3) |  |  |  |  | (2.3) |  | (2.3) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation related to share-based payments | 35.4 |  |  | 35.4 |  |  |  | 35.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance at Sep. 30, 2020 | 10,744.5 | $ 0.0 | $ 0.1 | 0.0 | (225.5) | 13,961.0 | $ (2,977.1) | 10,758.5 | (14.0) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance, shares at Sep. 30, 2020 |  | 0.0 | 177.7 |  |  |  | 23.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance, shares at Dec. 31, 2020 |  | 0.0 | 176.2 |  |  |  | 23.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance at Dec. 31, 2020 | 10,686.1 | $ 0.0 | $ 0.1 | 0.0 | (299.0) | 13,976.3 | $ (2,977.1) | 10,700.3 | (14.2) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 1,748.1 |  |  |  |  | 1,187.9 |  | 1,187.9 | 560.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), net of tax | 163.0 |  |  |  | 162.4 |  |  | 162.4 | 0.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital contribution by noncontrolling interest | 5.2 |  |  |  |  |  |  |  | 5.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution to noncontrolling interest | (100.0) |  |  |  |  |  |  |  | (100.0) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock, at cost, shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (6.0) |  |  |  |  |  |  |
Repurchase of common stock, at cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,800.0) |  |  |  | $ (1,800.0) | $ (1,800.0) |  |  |  |  |  |
Retirement of common stock pursuant to Share Repurchase Programs, at cost, shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (6.0) |  |  | (6.0) |  |  |  |  |  |  |
Retirement of common stock pursuant to Share Repurchase Progams, at cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.0 |  | $ (231.9) | $ (1,568.1) | $ 1,800.0 |  |  |  |  |  |  |
Issuance of common stock under stock option and stock purchase plans, shares |  |  | 0.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock under stock option and stock purchase plans | 44.3 |  |  | 44.3 |  |  |  | 44.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock under award plan, shares |  |  | 0.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock under stock award plan | (52.6) |  |  |  |  | (52.6) |  | (52.6) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation related to share-based payments | 186.1 |  |  | 186.1 |  |  |  | 186.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Other | 1.5 |  |  | 1.5 |  |  |  | 1.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance at Sep. 30, 2021 | 10,881.7 | $ 0.0 | $ 0.1 | 0.0 | (136.6) | 13,543.5 | $ (2,977.1) | 10,429.9 | 451.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance, shares at Sep. 30, 2021 |  | 0.0 | 170.7 |  |  |  | 23.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance, shares at Jun. 30, 2021 |  | 0.0 | 172.9 |  |  |  | 23.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance at Jun. 30, 2021 | 11,214.8 | $ 0.0 | $ 0.1 |  | (171.8) | 13,900.7 | $ (2,977.1) | 10,751.9 | 462.9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 318.1 |  |  |  |  | 329.2 |  | 329.2 | (11.1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), net of tax | 35.2 |  |  |  | 35.2 |  |  | 35.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital contribution by noncontrolling interest | 0.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution to noncontrolling interest | 0.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock, at cost, shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2.2) |
Repurchase of common stock, at cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (750.0) |  |  |  | $ (750.0) | $ (750.0)
Retirement of common stock pursuant to Share Repurchase Programs, at cost, shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2.2) |  |  | (2.2) |
Retirement of common stock pursuant to Share Repurchase Progams, at cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.0 |  | $ (68.6) | $ (681.4) | $ 750.0 |
Issuance of common stock under stock option and stock purchase plans | 11.0 |  |  | 11.0 |  |  |  | 11.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock under stock award plan | (5.0) |  |  |  |  | (5.0) |  | (5.0) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation related to share-based payments | 57.6 |  |  | 57.6 |  |  |  | 57.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Other | 0.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance at Sep. 30, 2021 | $ 10,881.7 | $ 0.0 | $ 0.1 | $ 0.0 | $ (136.6) | $ 13,543.5 | $ (2,977.1) | $ 10,429.9 | $ 451.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance, shares at Sep. 30, 2021 |  | 0.0 | 170.7 |  |  |  | 23.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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