Indebtedness (Debt Issuances Outstanding) (Details)	12 Months Ended
	Dec. 31, 2016 USD ($)		Dec. 31, 2016 CHF (SFr)		Dec. 31, 2016 EUR (€)
US Dollar Notes [Member] | 1.625% US Dollar Notes Due March 2017 [Member]
Debt Instrument [Line Items]
Face Value	$ 550,000,000
Interest Rate	1.625%		1.625%		1.625%
Issuance	Mar. 31, 2012
Maturity	Mar. 31, 2017
US Dollar Notes [Member] | 1.125% US Dollar Notes Due August 2017 [Member]
Debt Instrument [Line Items]
Face Value	$ 750,000,000
Interest Rate	1.125%		1.125%		1.125%
Issuance	Aug. 31, 2012
Maturity	Aug. 31, 2017
US Dollar Notes [Member] | 1.250% US Dollar Notes Due August 2017 [Member]
Debt Instrument [Line Items]
Face Value	$ 500,000,000
Interest Rate	1.25%		1.25%		1.25%
Issuance	Aug. 31, 2015
Maturity	Aug. 31, 2017
US Dollar Notes [Member] | 1.250% US Dollar Notes Due November 2017 [Member]
Debt Instrument [Line Items]
Face Value	$ 500,000,000
Interest Rate	1.25%		1.25%		1.25%
Issuance	Nov. 30, 2014
Maturity	Nov. 30, 2017
US Dollar Notes [Member] | 5.650% US Dollar Notes Due May 2018 [Member]
Debt Instrument [Line Items]
Face Value	$ 2,500,000,000
Interest Rate	5.65%		5.65%		5.65%
Issuance	May 31, 2008
Maturity	May 31, 2018
US Dollar Notes [Member] | 1.875% US Dollar Notes Due January 2019 [Member]
Debt Instrument [Line Items]
Face Value	$ 750,000,000
Interest Rate	1.875%		1.875%		1.875%
Issuance	Nov. 30, 2013
Maturity	Jan. 31, 2019
US Dollar Notes [Member] | 1.375% US Dollar Notes Due February 2019 [Member]
Debt Instrument [Line Items]
Face Value	$ 500,000,000
Interest Rate	1.375%		1.375%		1.375%
Issuance	Feb. 29, 2016
Maturity	Feb. 28, 2019
US Dollar Notes [Member] | 4.500% US Dollar Notes Due March 2020 [Member]
Debt Instrument [Line Items]
Face Value	$ 1,000,000,000
Interest Rate	4.50%		4.50%		4.50%
Issuance	Mar. 31, 2010
Maturity	Mar. 31, 2020
US Dollar Notes [Member] | 1.875% US Dollar Notes Due February 2021 [Member]
Debt Instrument [Line Items]
Face Value	$ 750,000,000
Interest Rate	1.875%		1.875%		1.875%
Issuance	Feb. 29, 2016
Maturity	Feb. 28, 2021
US Dollar Notes [Member] | 4.125% US Dollar Notes Due May 2021 [Member]
Debt Instrument [Line Items]
Face Value	$ 350,000,000
Interest Rate	4.125%		4.125%		4.125%
Issuance	May 31, 2011
Maturity	May 31, 2021
US Dollar Notes [Member] | 2.900% US Dollar Notes Due November 2021 [Member]
Debt Instrument [Line Items]
Face Value	$ 750,000,000
Interest Rate	2.90%		2.90%		2.90%
Issuance	Nov. 30, 2011
Maturity	Nov. 30, 2021
US Dollar Notes [Member] | 2.500% US Dollar Notes Due August 2022 [Member]
Debt Instrument [Line Items]
Face Value	$ 750,000,000
Interest Rate	2.50%		2.50%		2.50%
Issuance	Aug. 31, 2012
Maturity	Aug. 31, 2022
US Dollar Notes [Member] | 2.625% US Dollar Notes Due March 2023 [Member]
Debt Instrument [Line Items]
Face Value	$ 600,000,000
Interest Rate	2.625%		2.625%		2.625%
Issuance	Mar. 31, 2013
Maturity	Mar. 31, 2023
US Dollar Notes [Member] | 2.125% US Dollar Notes Due May 2023 [Member]
Debt Instrument [Line Items]
Face Value	$ 500,000,000
Interest Rate	2.125%		2.125%		2.125%
Issuance	May 31, 2016
Maturity	May 31, 2023
US Dollar Notes [Member] | 3.600% US Dollar Notes Due November 2023 [Member]
Debt Instrument [Line Items]
Face Value	$ 500,000,000
Interest Rate	3.60%		3.60%		3.60%
Issuance	Nov. 30, 2013
Maturity	Nov. 30, 2023
US Dollar Notes [Member] | 3.250% US Dollar Notes Due November 2024 [Member]
Debt Instrument [Line Items]
Face Value	$ 750,000,000
Interest Rate	3.25%		3.25%		3.25%
Issuance	Nov. 30, 2014
Maturity	Nov. 30, 2024
US Dollar Notes [Member] | 3.375% US Dollar Notes Due August 2025 [Member]
Debt Instrument [Line Items]
Face Value	$ 750,000,000
Interest Rate	3.375%		3.375%		3.375%
Issuance	Aug. 31, 2015
Maturity	Aug. 31, 2025
US Dollar Notes [Member] | 2.750% US Dollar Notes Due February 2026 [Member]
Debt Instrument [Line Items]
Face Value	$ 750,000,000
Interest Rate	2.75%		2.75%		2.75%
Issuance	Feb. 29, 2016
Maturity	Feb. 28, 2026
US Dollar Notes [Member] | 6.375% US Dollar Notes Due May 2038 [Member]
Debt Instrument [Line Items]
Face Value	$ 1,500,000,000
Interest Rate	6.375%		6.375%		6.375%
Issuance	May 31, 2008
Maturity	May 31, 2038
US Dollar Notes [Member] | 4.375% US Dollar Notes Due November 2041 [Member]
Debt Instrument [Line Items]
Face Value	$ 750,000,000
Interest Rate	4.375%		4.375%		4.375%
Issuance	Nov. 30, 2011
Maturity	Nov. 30, 2041
US Dollar Notes [Member] | 4.500% US Dollar Notes Due March 2042 [Member]
Debt Instrument [Line Items]
Face Value	$ 700,000,000
Interest Rate	4.50%		4.50%		4.50%
Issuance	Mar. 31, 2012
Maturity	Mar. 31, 2042
US Dollar Notes [Member] | 3.875% US Dollar Notes Due August 2042 [Member]
Debt Instrument [Line Items]
Face Value	$ 750,000,000
Interest Rate	3.875%		3.875%		3.875%
Issuance	Aug. 31, 2012
Maturity	Aug. 31, 2042
US Dollar Notes [Member] | 4.125% US Dollar Notes Due March 2043 [Member]
Debt Instrument [Line Items]
Face Value	$ 850,000,000
Interest Rate	4.125%		4.125%		4.125%
Issuance	Mar. 31, 2013
Maturity	Mar. 31, 2043
US Dollar Notes [Member] | 4.875% US Dollar Notes Due November 2043 [Member]
Debt Instrument [Line Items]
Face Value	$ 750,000,000
Interest Rate	4.875%		4.875%		4.875%
Issuance	Nov. 30, 2013
Maturity	Nov. 30, 2043
US Dollar Notes [Member] | 4.250% US Dollar Notes Due November 2044 [Member]
Debt Instrument [Line Items]
Face Value	$ 750,000,000
Interest Rate	4.25%		4.25%		4.25%
Issuance	Nov. 30, 2014
Maturity	Nov. 30, 2044
US Dollar Notes [Member] | 4.250% US Dollar Notes Issued May 2016 Due November 2044 [Member]
Debt Instrument [Line Items]
Face Value	$ 500,000,000
Interest Rate	4.25%		4.25%		4.25%
Issuance	May 31, 2016	[1]
Maturity	Nov. 30, 2044
Foreign Currency Obligations [Member] | 2.125% Euro Notes Due May 2019 [Member]
Debt Instrument [Line Items]
Face Value	$ 951,000,000	[2]			€ 750,000,000	[2]
Interest Rate	2.125%	[2]	2.125%	[2]	2.125%	[2]
Issuance	May 31, 2012	[2]
Maturity	May 31, 2019	[2]
Foreign Currency Obligations [Member] | 1.750% Euro Notes Due March 2020 [Member]
Debt Instrument [Line Items]
Face Value	$ 1,621,000,000	[2]			€ 1,250,000,000	[2]
Interest Rate	1.75%	[2]	1.75%	[2]	1.75%	[2]
Issuance	Mar. 31, 2013	[2]
Maturity	Mar. 31, 2020	[2]
Foreign Currency Obligations [Member] | 1.875% Euro Notes Due March 2021 [Member]
Debt Instrument [Line Items]
Face Value	$ 1,029,000,000	[2]			€ 750,000,000	[2]
Interest Rate	1.875%	[2]	1.875%	[2]	1.875%	[2]
Issuance	Mar. 31, 2014	[2]
Maturity	Mar. 31, 2021	[2]
Foreign Currency Obligations [Member] | 2.875% Euro Notes Due May 2024 [Member]
Debt Instrument [Line Items]
Face Value	$ 761,000,000	[2]			€ 600,000,000	[2]
Interest Rate	2.875%	[2]	2.875%	[2]	2.875%	[2]
Issuance	May 31, 2012	[2]
Maturity	May 31, 2024	[2]
Foreign Currency Obligations [Member] | 2.750% Euro Notes Due March 2025 [Member]
Debt Instrument [Line Items]
Face Value	$ 972,000,000	[2]			€ 750,000,000	[2]
Interest Rate	2.75%	[2]	2.75%	[2]	2.75%	[2]
Issuance	Mar. 31, 2013	[2]
Maturity	Mar. 31, 2025	[2]
Foreign Currency Obligations [Member] | 2.875% Euro Notes Due March 2026 [Member]
Debt Instrument [Line Items]
Face Value	$ 1,372,000,000	[2]			€ 1,000,000,000	[2]
Interest Rate	2.875%	[2]	2.875%	[2]	2.875%	[2]
Issuance	Mar. 31, 2014	[2]
Maturity	Mar. 31, 2026	[2]
Foreign Currency Obligations [Member] | 2.875% Euro Notes Due May 2029 [Member]
Debt Instrument [Line Items]
Face Value	$ 697,000,000	[2]			€ 500,000,000	[2]
Interest Rate	2.875%	[2]	2.875%	[2]	2.875%	[2]
Issuance	May 31, 2014	[2]
Maturity	May 31, 2029	[2]
Foreign Currency Obligations [Member] | 3.125% Euro Notes Due June 2033 [Member]
Debt Instrument [Line Items]
Face Value	$ 648,000,000	[2]			€ 500,000,000	[2]
Interest Rate	3.125%	[2]	3.125%	[2]	3.125%	[2]
Issuance	Jun. 30, 2013	[2]
Maturity	Jun. 30, 2033	[2]
Foreign Currency Obligations [Member] | 2.000% Euro Notes Due May 2036 [Member]
Debt Instrument [Line Items]
Face Value	$ 578,000,000	[2]			€ 500,000,000	[2]
Interest Rate	2.00%	[2]	2.00%	[2]	2.00%	[2]
Issuance	May 31, 2016	[2]
Maturity	May 31, 2036	[2]
Foreign Currency Obligations [Member] | 0.875% Swiss Franc Notes Due March 2019 [Member]
Debt Instrument [Line Items]
Face Value	$ 217,000,000	[2]	SFr 200,000,000	[2]
Interest Rate	0.875%	[2]	0.875%	[2]	0.875%	[2]
Issuance	Mar. 31, 2013	[2]
Maturity	Mar. 31, 2019	[2]
Foreign Currency Obligations [Member] | 0.750% Swiss Franc Notes Due December 2019 [Member]
Debt Instrument [Line Items]
Face Value	$ 311,000,000	[2]	SFr 275,000,000	[2]
Interest Rate	0.75%	[2]	0.75%	[2]	0.75%	[2]
Issuance	May 31, 2014	[2]
Maturity	Dec. 31, 2019	[2]
Foreign Currency Obligations [Member] | 1.000% Swiss Franc Notes Due September 2020 [Member]
Debt Instrument [Line Items]
Face Value	$ 334,000,000	[2]	SFr 325,000,000	[2]
Interest Rate	1.00%	[2]	1.00%	[2]	1.00%	[2]
Issuance	Sep. 30, 2012	[2]
Maturity	Sep. 30, 2020	[2]
Foreign Currency Obligations [Member] | 2.000% Swiss Franc Notes Due December 2021 [Member]
Debt Instrument [Line Items]
Face Value	$ 335,000,000	[2]	SFr 300,000,000	[2]
Interest Rate	2.00%	[2]	2.00%	[2]	2.00%	[2]
Issuance	Dec. 31, 2011	[2]
Maturity	Dec. 31, 2021	[2]
Foreign Currency Obligations [Member] | 1.625% Swiss Franc Notes Due May 2024 [Member]
Debt Instrument [Line Items]
Face Value	$ 283,000,000	[2]	SFr 250,000,000	[2]
Interest Rate	1.625%	[2]	1.625%	[2]	1.625%	[2]
Issuance	May 31, 2014	[2]
Maturity	May 31, 2024	[2]

[1] These notes are a further issuance of the 4.250% notes issued by PMI in November 2014.

[2] USD equivalents for foreign currency notes were calculated based on exchange rates on the date of issuance.