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Consolidated Statements of Cash Flows (Parenthetical) | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($)
Payments of borrowings included in investing activities | $ 755,200,000
Total payment of borrowings | 1,100,000,000
Value, shares repurchased | 1,302,100,000
ASR Program |
Stock repurchase program, authorized amount | 400,000,000.0
Value, shares repurchased | $ 320,000,000.0

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