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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 | 2019 Share Repurchase Program | 2019 Share Repurchase Program Common stock | 2019 Share Repurchase Program Additional paid-in capital | 2019 Share Repurchase Program Retained earnings | 2019 Share Repurchase Program Treasury stock | 2019 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 | 1,392.6 |  |  |  |  | 1,399.1 |  | 1,399.1 | (6.5) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), net of tax | (13.5) |  |  |  | (14.1) |  |  | (14.1) | 0.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock, at cost, shares |  |  |  |  |  |  |  |  |  |  |  |  |  | (3.2) |  | (4.1) |  |  |  | (4.1) |  | (3.2) |  |  |  |  |
Repurchase of common stock, at cost |  |  |  |  |  |  |  |  |  | $ (941.1) |  |  |  | $ (941.1) | $ (941.1) | $ (1,279.1) |  |  |  | $ (1,279.1) | $ (1,279.1) |  |  |  |  |  |
Retirement of common stock pursuant to Share Repurchase Programs, at cost, shares |  |  |  |  |  |  |  |  |  |  | (3.2) |  |  | (3.2) |  |  | (4.1) |  |  | (4.1) |  |  |  |  |  |  |
Retirement of common stock pursuant to Share Repurchase Progams, at cost |  |  |  |  |  |  |  |  |  | $ 0.0 | $ 0.0 | $ (15.6) | $ (925.5) | $ 941.1 | $ 0.0 |  |  | $ (71.0) | $ (1,208.1) | $ 1,279.1 |  |  |  |  |  |  |
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 | 18.1 |  | $ 0.0 | 18.1 |  |  |  | 18.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock under award plan, shares |  |  | 0.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock under stock award plan | (47.8) |  | $ 0.0 | 0.0 |  | (47.8) |  | (47.8) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation related to share-based payments | 69.2 |  |  | 69.2 |  | 0.0 |  | 69.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Other | (0.6) |  |  | (0.6) |  |  |  | (0.6) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance at Mar. 31, 2020 | 12,536.9 | $ 0.0 | $ 0.1 | 0.1 | (149.3) | 15,673.1 | $ (2,977.1) | 12,546.9 | (10.0) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance, shares at Mar. 31, 2020 |  | 0.0 | (191.1) |  |  |  | (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 | 404.6 |  |  |  |  | 410.2 |  | 410.2 | (5.6) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), net of tax | 125.4 |  |  |  | 124.7 |  |  | 124.7 | 0.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest, increase (decrease) other | 0.1 |  |  |  |  |  |  | 0.0 | 0.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock, at cost, shares |  |  | 0.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2.2) |
Repurchase of common stock, at cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (600.0) |  |  |  | $ (600.0) | $ (600.0)
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 | $ 0.0 | $ (93.8) | $ (506.2) | $ 600.0 | $ 0.0
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 | 19.7 |  | $ 0.0 | 19.7 |  |  |  | 19.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock under award plan, shares |  |  | 0.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock under stock award plan | (46.8) |  | $ 0.0 | 0.0 |  | (46.8) |  | (46.8) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation related to share-based payments | 72.6 |  |  | 72.6 |  |  |  | 72.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Other | 1.5 |  |  | 1.5 |  | 0.0 |  | 1.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance at Mar. 31, 2021 | $ 10,663.2 | $ 0.0 | $ 0.1 | $ 0.0 | $ (174.3) | $ 13,833.5 | $ (2,977.1) | $ 10,682.2 | $ (19.0) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance, shares at Mar. 31, 2021 |  | 0.0 | (174.4) |  |  |  | (23.8) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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