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Subsequent Event	12 Months Ended
Subsequent Event	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event On February 13, 2019, the Company’s Board of Directors authorized a new share repurchase of up to $1.5 billion of the Company’s common stock. The Company is not obligated to repurchase any specific number of shares, and may suspend or discontinue the program at any time.