Treasury Stock	6 Months Ended
Jun. 30, 2018
Treasury Stock Transactions, Excluding Value of Shares Reissued [Abstract]
Treasury Stock	Treasury Stock: The Company’s Board of Directors has authorized common stock repurchases under a share repurchase program up to $3 billion, exclusive of any fees, commissions, or other expenses related to such repurchases through December 31, 2020. The repurchases may be made from time to time on the open market or in privately negotiated transactions. The timing and amount of any shares repurchased under the program will depend on a variety of factors, including price, corporate and regulatory requirements, capital availability and other market conditions. Repurchased shares are accounted for at cost and will be held in treasury for future issuance. The program may be limited or terminated at any time without prior notice. The Company repurchased approximately 1.5 million and 2.2 million shares of common stock under the share repurchase program for a total cost of $95.1 million and $133.6 million during the second quarters of fiscal 2018 and fiscal 2017, respectively. The Company repurchased approximately 3.8 million shares under the share repurchase program during the first six months of both fiscal 2018 and fiscal 2017 for a total cost of $252.5 million and $248.1 million, respectively. As of June 30, 2018, the Company had remaining authorization under the share repurchase program of $0.62 billion, exclusive of any fees, commissions or other expenses.

Treasury Stock:

The Company’s Board of Directors has authorized common stock repurchases under a share repurchase program up to $3 billion, exclusive of any fees, commissions, or other expenses related to such repurchases through December 31, 2020. The repurchases may be made from time to time on the open market or in privately negotiated transactions. The timing and amount of any shares repurchased under the program will depend on a variety of factors, including price, corporate and regulatory requirements, capital availability and other market conditions. Repurchased shares are accounted for at cost and will be held in treasury for future issuance. The program may be limited or terminated at any time without prior notice.

The Company repurchased approximately 1.5 million and 2.2 million shares of common stock under the share repurchase program for a total cost of $95.1 million and $133.6 million during the second quarters of fiscal 2018 and fiscal 2017, respectively. The Company repurchased approximately 3.8 million shares under the share repurchase program during the first six months of both fiscal 2018 and fiscal 2017 for a total cost of $252.5 million and $248.1 million, respectively. As of June 30, 2018, the Company had remaining authorization under the share repurchase program of $0.62 billion, exclusive of any fees, commissions or other expenses.