Subsequent Event	9 Months Ended
Sep. 30, 2017
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event On October 4, 2017, the Company completed the public offering (the 2017 Notes Offering) of $500 million aggregate principal amount of Floating Rate Notes due 2020 (the Floating Rate Notes), $500 million aggregate principal amount of 2.50% Senior Notes due 2020 (the 2020 Notes), $750 million aggregate principal amount of 3.00% Senior Notes due 2022 (the 2022 Notes) and $1.25 billion aggregate principal amount of 3.90% Senior Notes due 2027 (the 2027 Notes and, together with the Floating Rate Notes, the 2020 Notes and the 2023 Notes, the 2017 Notes). The Company received net proceeds from the 2017 Notes Offering of approximately $2,974.3 million, which the Company expects to use, together with other cash on hand and borrowings under the Company’s revolving credit facility, to fund the cash portion of the Merger Consideration, to pay expenses related to the Rice Merger and other transactions contemplated by the Rice Merger Agreement (including the refinancing of certain indebtedness of Rice and its subsidiaries), to redeem or repay certain Company senior notes and medium term notes due in 2018 and for other general corporate purposes. In October 2017, the Company delivered redemption notices pursuant to which the Company expects to redeem all of its outstanding $200 million aggregate principal amount 5.15% Senior Notes due 2018 and $500 million aggregate principal amount 6.50% Senior Notes due 2018 in November 2017. Upon redemption, the Company will pay make whole call premiums based upon prevailing rates on U.S. government securities at the time of redemption. The indentures related to the 2017 Notes contain covenants that limit the Company’s ability to, among other things, incur certain liens securing indebtedness, engage in certain sale and leaseback transactions and enter into certain consolidations, mergers or sales other than for cash or leases of the Company’s assets substantially as an entirety. In addition, if the Rice Merger does not occur on or before May 19, 2018 or the Company notifies the trustee under the indenture governing the 2017 Notes that the Company will not pursue the consummation of the Rice Merger, the Company will be required to redeem the Floating Rate Notes, the 2020 Notes and the 2027 Notes (but not the 2022 Notes) then outstanding at a redemption price equal to 101% of the principal amount of the notes to be redeemed plus accrued and unpaid interest to, but excluding, the redemption date.

Subsequent Event

On October 4, 2017, the Company completed the public offering (the 2017 Notes Offering) of $500 million aggregate principal amount of Floating Rate Notes due 2020 (the Floating Rate Notes), $500 million aggregate principal amount of 2.50% Senior Notes due 2020 (the 2020 Notes), $750 million aggregate principal amount of 3.00% Senior Notes due 2022 (the 2022 Notes) and $1.25 billion aggregate principal amount of 3.90% Senior Notes due 2027 (the 2027 Notes and, together with the Floating Rate Notes, the 2020 Notes and the 2023 Notes, the 2017 Notes). The Company received net proceeds from the 2017 Notes Offering of approximately $2,974.3 million, which the Company expects to use, together with other cash on hand and borrowings under the Company’s revolving credit facility, to fund the cash portion of the Merger Consideration, to pay expenses related to the Rice Merger and other transactions contemplated by the Rice Merger Agreement (including the refinancing of certain indebtedness of Rice and its subsidiaries), to redeem or repay certain Company senior notes and medium term notes due in 2018 and for other general corporate purposes. In October 2017, the Company delivered redemption notices pursuant to which the Company expects to redeem all of its outstanding $200 million aggregate principal amount 5.15% Senior Notes due 2018 and $500 million aggregate principal amount 6.50% Senior Notes due 2018 in November 2017. Upon redemption, the Company will pay make whole call premiums based upon prevailing rates on U.S. government securities at the time of redemption.

The indentures related to the 2017 Notes contain covenants that limit the Company’s ability to, among other things, incur certain liens securing indebtedness, engage in certain sale and leaseback transactions and enter into certain consolidations, mergers or sales other than for cash or leases of the Company’s assets substantially as an entirety. In addition, if the Rice Merger does not occur on or before May 19, 2018 or the Company notifies the trustee under the indenture governing the 2017 Notes that the Company will not pursue the consummation of the Rice Merger, the Company will be required to redeem the Floating Rate Notes, the 2020 Notes and the 2027 Notes (but not the 2022 Notes) then outstanding at a redemption price equal to 101% of the principal amount of the notes to be redeemed plus accrued and unpaid interest to, but excluding, the redemption date.