Debt (Summary of Long-Term Debt) (Details) SEK in Millions, $ in Millions		9 Months Ended
		Sep. 30, 2016 SEK	Sep. 30, 2016 USD ($)		Jun. 24, 2016 USD ($)	Jun. 09, 2016 USD ($)	Dec. 31, 2015 USD ($)		Dec. 09, 2015	Dec. 24, 2013	Nov. 13, 2013	Jun. 18, 2013
Debt Instrument [Line Items]
Current portion of long-term debt			$ 4,278.8				$ 998.7
Unamortized debt issuance expense			(75.3)				(35.4)
Long-term debt, excluding current maturities			11,328.6				6,295.6
Current portion of long-term debt and other long-term obligations			4,434.6				1,077.0
Other Current Portion of Long-term Debt
Debt Instrument [Line Items]
Current portion of long-term debt			4.4				1.6
Other
Debt Instrument [Line Items]
Non-current portion of long-term debt			7.8				2.7
Senior Notes | 2016 Senior Notes (1.800% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[1]											1.80%
Current portion of long-term debt	[1]		0.0				500.1
Principal amount of debt instrument					$ 500.0
Final interest payment					$ 4.5
Senior Notes | 2016 Senior Notes (1.350% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[2]										1.35%
Current portion of long-term debt	[2]		500.0				499.9
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.125%
Senior Notes | 2018 Senior Notes (2.600% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[3]											2.60%
Non-current portion of long-term debt	[3]		649.5				649.3
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.30%
Senior Notes | 2018 Senior Notes (3.000% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[3]								3.00%
Non-current portion of long-term debt	[3]		499.5				499.4
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.30%
Senior Notes | 2019 Senior Notes (2.500% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[4]					2.50%
Non-current portion of long-term debt			999.0	[4]		$ 1,000.0	0.0	[4]
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.25%
Senior Notes | 2019 Senior Notes (2.550% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[5]										2.55%
Non-current portion of long-term debt	[5]		499.4				499.2
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.20%
Senior Notes | 2020 Senior Notes (3.750% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[6]								3.75%
Non-current portion of long-term debt	[6]		499.9				499.8
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.35%
Senior Notes | 2021 Senior Notes (3.150% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[7]					3.15%
Non-current portion of long-term debt			2,247.5	[7]		$ 2,250.0	0.0	[7]
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.30%
Senior Notes | 2023 Senior Notes (3.125% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[5]									3.125%
Non-current portion of long-term debt	[5]		815.4				785.2
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.20%
Senior Notes | 2023 Senior Notes (4.200% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[8]										4.20%
Non-current portion of long-term debt	[8]		498.5				498.4
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.25%
Senior Notes | 2026 Senior Notes (3.950% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[9]					3.95%
Non-current portion of long-term debt			2,233.1	[9]		$ 2,250.0	0.0	[9]
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.35%
Senior Notes | 2043 Senior Notes (5.400% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[10]										5.40%
Non-current portion of long-term debt	[10]		497.0				497.0
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.25%
Senior Notes | 2046 Senior Notes (5.250% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[11]					5.25%
Non-current portion of long-term debt			999.8	[11]		$ 1,000.0	0.0	[11]
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.40%
2015 Term Loans
Debt Instrument [Line Items]
Current portion of long-term debt	[12]		1,600.0				0.0
Non-current portion of long-term debt	[12]		0.0				1,600.0
2014 Term Loan
Debt Instrument [Line Items]
Non-current portion of long-term debt	[13]		800.0				800.0
Bank Loan Obligations | Meda Bank Loan (25 Billion Kr)
Debt Instrument [Line Items]
Current portion of long-term debt	[14]		1,942.6				0.0
Current portion of long-term debt and other long-term obligations | SEK		SEK 16,700
Fair value adjustment			$ 192.0
Number of foreign banks		9	9
Bank Loan Obligations | Meda Bank Loan (2 Billion Kr)
Debt Instrument [Line Items]
Current portion of long-term debt	[15]		$ 233.3				0.0
Non-current portion of long-term debt | SEK		SEK 2,000
Bank Loan Obligations | Maximum | Meda Bank Loan (25 Billion Kr)
Debt Instrument [Line Items]
Current portion of long-term debt and other long-term obligations | SEK		25,000
Medium-term Notes | Meda Medium Term Notes
Debt Instrument [Line Items]
Non-current portion of long-term debt		1,350	157.5	[16]			0.0	[16]
Medium-term Notes | Maximum | Meda Medium Term Notes
Debt Instrument [Line Items]
Non-current portion of long-term debt | SEK		7,000
Medium-term Notes | 2018 | Meda Medium Term Notes
Debt Instrument [Line Items]
Non-current portion of long-term debt | SEK		600
Medium-term Notes | 2019 | Meda Medium Term Notes
Debt Instrument [Line Items]
Non-current portion of long-term debt | SEK		SEK 750
Deferred financing fees
Debt Instrument [Line Items]
Unamortized debt issuance expense			$ (1.5)				$ (2.9)

[1] Instrument was due on June 24, 2016, and the Company paid the principal amount of $500.0 million and final interest payment of $4.5 million at that time using available cash on hand.

[2] Instrument is callable by the Company at any time at the greater of 100% of the principal amount and the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.125% plus, in each case, accrued and unpaid interest. Instrument is due on November 29, 2016 and accordingly is included in current portion of long-term debt and other long-term obligations in the Condensed Consolidated Balance Sheets at September 30, 2016.

[3] Instrument is callable by the Company at any time at the greater of 100% of the principal amount and the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.30% plus, in each case, accrued and unpaid interest.

[4] Instrument is callable by the Company at any time at the greater of 100% of the principal amount and the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.25% plus, in each case, accrued and unpaid interest.

[5] Instrument is callable by the Company at any time at the greater of 100% of the principal amount and the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.20% plus, in each case, accrued and unpaid interest.

[6] Instrument is callable by the Company at any time prior to the date that is one month prior to the instrument’s maturity date at the greater of 100% of the principal amount and the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.35% plus, in each case, accrued and unpaid interest. On or after such date, the instrument is callable by the Company at 100% of the principal amount plus accrued and unpaid interest.

[7] Instrument is callable by the Company at any time prior to the date that is one month prior to the instrument’s maturity date at the greater of 100% of the principal amount and the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.30% plus, in each case, accrued and unpaid interest. On or after such date, the instrument is callable by the Company at 100% of the principal amount plus accrued and unpaid interest.

[8] Instrument is callable by the Company at any time prior to August 29, 2023 at the greater of 100% of the principal amount and the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.25% plus, in each case, accrued and unpaid interest. On or after such date, the instrument is callable by the Company at 100% of the principal amount plus accrued and unpaid interest.

[9] Instrument is callable by the Company at any time prior to the date that is three months prior to the instrument’s maturity date at the greater of 100% of the principal amount and the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.35% plus, in each case, accrued and unpaid interest. On or after such date, the instrument is callable by the Company at 100% of the principal amount plus accrued and unpaid interest.

[10] Instrument is callable by the Company at any time prior to May 29, 2043 at the greater of 100% of the principal amount and the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.25% plus, in each case, accrued and unpaid interest. On or after such date, the instrument is callable by the Company at 100% of the principal amount plus accrued and unpaid interest.

[11] Instrument is callable by the Company at any time prior to the date that is six months prior to the instrument’s maturity date at the greater of 100% of the principal amount and the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.40% plus, in each case, accrued and unpaid interest. On or after such date, the instrument is callable by the Company at 100% of the principal amount plus accrued and unpaid interest.

[12] The 2015 Term Loans mature on July 15, 2017, subject to extension to December 19, 2017. Accordingly, the 2015 Term Loans are included in current portion of long-term debt and other long-term obligations in the Condensed Consolidated Balance Sheets at September 30, 2016.

[13] The 2014 Term Loan matures on December 19, 2017.

[14] Approximately 16.7kr billion of borrowings under a 25kr billion facility with nine Swedish and foreign banks that matures on August 30, 2017, and accordingly is included in current portion of long-term debt and other long-term obligations in the Condensed Consolidated Balance Sheets at September 30, 2016.

[15] Represents a bank loan of 2kr billion with AB Svensk Exportkredit (publ), as lender (“Svensk Exportkredit”) which is callable by the lender as a result of the completion of the Offer, and accordingly is included in current portion of long-term debt and other long-term obligations in the Condensed Consolidated Balance Sheets at September 30, 2016.

[16] Swedish medium term notes (“MTN”) program with an upper limit of 7kr billion. Of the total amount outstanding of 1.35kr billion, 600kr million matures on April 5, 2018 and 750kr million matures on May 21, 2019.