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Financial instruments (Tables)
 6 Months Ended
Jun. 30, 2021
Financial Instruments [Abstract]  
Disclosure of fair value measurement of assets
The below tables summarize financial assets and liabilities measured at fair value on a recurring basis or at amortized cost or cost as of June 30, 2021 and December 31, 2020.
June 30, 2021
($ millions)Level 1Level 2Level 3
Valued at amortized cost or cost(3)
Total
Non-current financial assets
Long-term financial investments measured at FVOCI— — 37 — 37 
Long-term financial investments measured at FVPL— — 10 — 10 
Long-term receivables from customers— — — 113 113 
Deferred compensation assets(1)
148 — — — 148 
Non-current minimum lease payments from finance lease agreements— — — 38 38 
Long-term loans, advances and security deposits— — — 22 22 
Non-current financial assets148 — 47 173 368 
Current financial assets
Money market funds445 — — — 445 
Current portion of long-term financial investments measured at FVPL(2)
— — 5 — 5 
Current portion of long-term receivables from customers(2)
— — — 105 105 
Current portion of minimum lease payments from finance lease agreements(2)
— — — 30 30 
Other receivables, security deposits and current assets(2)
— — — 62 62 
VAT receivables(2)
— — — 67 67 
Derivative financial instruments(2)
— 3 — — 3 
Current financial assets445 3 5 264 717 
Financial assets at fair value and amortized cost or cost593 3 52 437 1,085 
Financial liabilities
Contingent consideration liabilities— — (149)— (149)
Non-current financial debt— — — (3,986)(3,986)
Current financial debt— — — (132)(132)
Derivative financial instruments— (4)— — (4)
Financial liabilities at fair value and amortized cost— (4)(149)(4,118)(4,271)
(1)    Recorded in Other non-current assets.
(2)    Recorded in Other current assets.
(3)    The carrying amount is a reasonable approximation of fair value, with the exception of Series 2026, 2029, 2030, and 2049 notes recorded in Non-current financial debt with a fair value of $2,906 million and a carrying value of $2,726 million as of June 30, 2021. The fair value of notes was determined using Level 2 inputs. The notes were valued using the quoted market price for such notes, which have low trading volumes.
December 31, 2020
($ millions)Level 1Level 2Level 3
Valued at amortized cost or cost(3)
Total
Non-current financial assets
Long-term financial investments measured at FVOCI— — 28 — 28 
Long-term financial investments measured at FVPL— — 12 — 12 
Long-term receivables from customers— — — 117 117 
Deferred compensation assets(1)
137 — — — 137 
Non-current minimum lease payments from finance lease agreements— — — 39 39 
Long-term loans, advances and security deposits— — — 22 22 
Non-current financial assets137 — 40 178 355 
Current financial assets
Money market funds625 — — — 625 
Current portion of long-term financial investments measured at FVPL(2)
— — 12 — 12 
Current portion of long-term receivables from customers(2)
— — — 107 107 
Current portion of minimum lease payments from finance lease agreements(2)
— — — 29 29 
Other receivables, security deposits and current assets(2)
— — — 88 88 
VAT receivables(2)
— — — 72 72 
Derivative financial instruments(2)
— 3 — — 3 
Current financial assets625 3 12 296 936 
Financial assets at fair value and amortized cost or cost762 3 52 474 1,291 
Financial liabilities
Contingent consideration liabilities— — (157)— (157)
Non-current financial debt— — — (3,949)(3,949)
Current financial debt— — — (162)(162)
Derivative financial instruments— (7)— — (7)
Financial liabilities at fair value and amortized cost— (7)(157)(4,111)(4,275)
(1)    Recorded in Other non-current assets.
(2)    Recorded in Other current assets.
(3)    The carrying amount is a reasonable approximation of fair value, with the exception of Series 2026, 2029, 2030, and 2049 notes recorded in Non-current financial debt with a fair value of $3,036 million and a carrying value of $2,726 million as of December 31, 2020. The fair value of notes was determined using Level 2 inputs. The notes were valued using the quoted market price for such notes, which have low trading volumes.
Financial assets
Long-term financial investments measured
at FVOCI		Financial investments
measured at FVPL
($ millions)2021202020212020
Balance as of January 128 31 24 61 
Additions9 — — — 
(Loss) recognized in consolidated statement of comprehensive income/(loss)— (10)— — 
Unrealized (losses)/gains in consolidated income statement— — (1)3 
Amortization— — (8)(23)
Balance as of June 3037 21 15 41 
Disclosure of fair value measurement of liabilities
The below tables summarize financial assets and liabilities measured at fair value on a recurring basis or at amortized cost or cost as of June 30, 2021 and December 31, 2020.
June 30, 2021
($ millions)Level 1Level 2Level 3
Valued at amortized cost or cost(3)
Total
Non-current financial assets
Long-term financial investments measured at FVOCI— — 37 — 37 
Long-term financial investments measured at FVPL— — 10 — 10 
Long-term receivables from customers— — — 113 113 
Deferred compensation assets(1)
148 — — — 148 
Non-current minimum lease payments from finance lease agreements— — — 38 38 
Long-term loans, advances and security deposits— — — 22 22 
Non-current financial assets148 — 47 173 368 
Current financial assets
Money market funds445 — — — 445 
Current portion of long-term financial investments measured at FVPL(2)
— — 5 — 5 
Current portion of long-term receivables from customers(2)
— — — 105 105 
Current portion of minimum lease payments from finance lease agreements(2)
— — — 30 30 
Other receivables, security deposits and current assets(2)
— — — 62 62 
VAT receivables(2)
— — — 67 67 
Derivative financial instruments(2)
— 3 — — 3 
Current financial assets445 3 5 264 717 
Financial assets at fair value and amortized cost or cost593 3 52 437 1,085 
Financial liabilities
Contingent consideration liabilities— — (149)— (149)
Non-current financial debt— — — (3,986)(3,986)
Current financial debt— — — (132)(132)
Derivative financial instruments— (4)— — (4)
Financial liabilities at fair value and amortized cost— (4)(149)(4,118)(4,271)
(1)    Recorded in Other non-current assets.
(2)    Recorded in Other current assets.
(3)    The carrying amount is a reasonable approximation of fair value, with the exception of Series 2026, 2029, 2030, and 2049 notes recorded in Non-current financial debt with a fair value of $2,906 million and a carrying value of $2,726 million as of June 30, 2021. The fair value of notes was determined using Level 2 inputs. The notes were valued using the quoted market price for such notes, which have low trading volumes.
December 31, 2020
($ millions)Level 1Level 2Level 3
Valued at amortized cost or cost(3)
Total
Non-current financial assets
Long-term financial investments measured at FVOCI— — 28 — 28 
Long-term financial investments measured at FVPL— — 12 — 12 
Long-term receivables from customers— — — 117 117 
Deferred compensation assets(1)
137 — — — 137 
Non-current minimum lease payments from finance lease agreements— — — 39 39 
Long-term loans, advances and security deposits— — — 22 22 
Non-current financial assets137 — 40 178 355 
Current financial assets
Money market funds625 — — — 625 
Current portion of long-term financial investments measured at FVPL(2)
— — 12 — 12 
Current portion of long-term receivables from customers(2)
— — — 107 107 
Current portion of minimum lease payments from finance lease agreements(2)
— — — 29 29 
Other receivables, security deposits and current assets(2)
— — — 88 88 
VAT receivables(2)
— — — 72 72 
Derivative financial instruments(2)
— 3 — — 3 
Current financial assets625 3 12 296 936 
Financial assets at fair value and amortized cost or cost762 3 52 474 1,291 
Financial liabilities
Contingent consideration liabilities— — (157)— (157)
Non-current financial debt— — — (3,949)(3,949)
Current financial debt— — — (162)(162)
Derivative financial instruments— (7)— — (7)
Financial liabilities at fair value and amortized cost— (7)(157)(4,111)(4,275)
(1)    Recorded in Other non-current assets.
(2)    Recorded in Other current assets.
(3)    The carrying amount is a reasonable approximation of fair value, with the exception of Series 2026, 2029, 2030, and 2049 notes recorded in Non-current financial debt with a fair value of $3,036 million and a carrying value of $2,726 million as of December 31, 2020. The fair value of notes was determined using Level 2 inputs. The notes were valued using the quoted market price for such notes, which have low trading volumes.
Financial liabilities
Contingent consideration liabilities
($ millions)20212020
Balance as of January 1(157)(243)
Accretion for passage of time(7)(9)
Adjustments for changes in assumptions— 40 
Payments15 20 
Balance as of June 30(149)(192)